Drill support



Patented Apr. 8, i32

were

ELMER GEORGE GABTIN, O1 CLAREMONT, NEW HAliIESHIB-E, ASSIGNOR T0 SULLIVAN MACHINERY, l5, QQRPORATION O33 MASSACHUSETTS.

DRILL SUPPORT.

Application filed October 7, 1918.

To all whom it may concern:

Be it known that 1, Emma G. GARTIN, a citizen of the United States, residing at Claremont, in the county of Sullivan and State of New Hampshire, have invented certain new and useful Improvements in Drill Supports, of which the following is a full, clear, and exact specification.

This invention relates to standards, and more particularly to standards adapted to support pneumatically i'ted hammer drills, the principal object or" the present invention being to provide a resilient connection be tween certain of the supporting members so that the tendency of the pneumatic feed to bind and wear excessively when the drill steel is held with diiiiculty centrally in the hole being bored, is obviated by the absorption of any angular thrusts by the resilient connection.

The invention relates more particularly, though not exclusively, to the type of pneumatically fed drill disclosed in the patent to Gilman, No. 1,250,933, issued Dec. 18, 1917, and since the pneumatic feed and hammer drill form no part of this invention I have, for thesalre of illustrating one embodiment which my invention assume, shown my improved resilient support as applied to a drilling apparatus such as is disclosed in the said Gilman patent. When a drill steel is fed into a rock or other formation it frequently encounters hard quartz balls or angling seams which tend to change the path of the drill steel. This produces a binding action between the feed piston and its cylinder, resulting in a slowing up of the drilling operation and in an excessive wearing of the piston and cylinder walls. This defect I overcome in the present invention, which will be best understood by reference to the following description, when taken in connec tion with the accompanying illustration of a specific embodiment thereof, while its scope will be more particularly pointed'out in the appended claims.

In the drawings,-

Fig. 1 is a side elevation of'a pneumatic feed hammer drill having'my improved resilient support attached thereto;

Fig. 2 is a sectional view on the'line 2-2 ofFig.1.'-

Fig. 8 is a side elevation, partially in section, of a modification.-

ig. 4: is a front elevation thereof,

Serial Ito. 257,258.

Referring to the drawings, 1 have there shown for the aurpose of illustrating the principal features of the invention, a pneumatic hammer 1, adapted to drive a drill steel 2, and having a water supply pipe 3 and water control. valve l attached thereto for supplying water to the cutting end of the; drill steel to wash away the cuttings. The Vfiow of fluid pressure to the opposite ends or" the hammer piston, in the pneumatic hammer,- is controlled by a valve in a valve chest 5, the pressure fluid being fed to the valve chest through a passage in a hammer supporting member 6, and being governed by a cut-off valve, 7. This cut-0E valve 7 also controls flow of pressure fluid through 8, formed in a piston rod 9, leading to the opposite sides of a feed piston head which slides in a feed cylinder 10, and is carried on the inner end of the piston rod. In operation the controlvalve 7 is turned to admit a fluid under pressure to the rear or front side of the piston to feed the drill steel toward or away from the work, the valve 7 also controlling the passage of the pressure fluid to the pneumatic hammer to operate the same. Further description of these parts is deemed unnecessary since they are fully disclosed in the patent above referred to, and since they form no part of the present invention.

The cylinder 10 is securely held between two jaws 11, 12, which are connected by a hinge 13, and which may be clamped together about the cylinder at any point longit-udin ally thereof by means of a swing bolt 14L attached to one (herein the lower) jaw 12 by a pin passing through an eye in the bolt and two lugs 15 formed on said jaw 12, the bolt being provided with a threaded end to receive a nut 16 and a washer 17 contacting with slotted projection 18 on the other jaw 11, by means of which the jaws are drawn toward each other. A boss 19 formed on the jaw 12 is provided herein also with a recess and an opening bored centrally in the boss to receive a retaining bolt 20 which passes through a corresponding hole in a base plate 21 which is held on the bolt by a nut. A collar 22; projects from the plate 21 toward the clamp and carries ina recess formed therein a heavy coiled spring 23 which abuts against the boss 19 and plate 21 and which contacts with and is reenforced by the. innerwall f he elle? 22;. 'Thelmse plate 21 may be adjust-ably attached to a tripod, bar, or other usual support by a suitable clamping means, such as is shown at 24.

In the modification shown in Figs. 3 and 4:, two bolts 25 are supported in spaced relation by a plate or upright 26 formed on the base plate 21, and heavy springs 27 are held under compression between nuts on the outer ends of the bolts and a depending flange 28 formed integral with the lower jaw 12 of the clamp. The meeting faces of the members 26 and 28 are respectively conveXed and concaved, as is shown at 29. to facilitate the turning movement of one member on the other.

In the normal use of my invention it will be understood that the member 21 is, as illustrated in the drawings, a swivel adapted with the member 24 to permit adjustment of the feed cylinder in any direction around a perpendicular axis passing through the center of the swivel. It will also be understood that the member 24 is secured to a stationary mounting, for example, a post or tripod.-

The operation of the resilient support will be apparent from the foregoing description, it being evident that any angular thrust produced by a change of direction of travel of the drill steel and tending to bind the piston in the cylinder 10, will be in part absorbed by the springs 23 or 27, and that the members 19 and 22 or 26 and 28 will move relatively to permit the cylinder 10 to :issume a position parallel to the drill stee While I have herein shown and described for the purpose of illustration one specific embodiment of the invention, it is to be understood that the same has been submit ed for illustrative purposes only, and that extensive deviations may be made from the disclosed form thereof without departing from the spirit of the invention.

l Vhat I claim as new and desire to secure by Letters Patent is:

1. In combination, a drilling tool, feeding means therefor, a support for said feeding means, and resilient means between said feeding means and support for automatically permitting equiangular deflection of said feeding means and tool when the latter is deflected in a hole.

2. In combination, a drilling tool, feeding means therefor, a movable member supporting said feeding means, a swivel member, and a resilient connection between said swivel member and movable member permitting the automatic deflection of said tool and feeding means when the former is deflected in ahole.

3. In a pneumatic drill support, the combination including a member adapted to normally hold a drill for movement in a given direction, and means attached to said movement of said member when deflection of the drill in any direction by the direction of movement of the latter is changed during the drilling operation.

4:. In a pneumatic drill support, the com bination including a member adapted to normally hold a drill for movement in a given direction, and a resilient means attached to said member for permitting a movement of said member when by deflection of the drill in any direction the direction of movement of the latter is changed during the drilling operation.

5. In an apparatus of the class described, the combination including a feeding mechanism, a percussive motor and a drill steel supported by said motor, clamping means adapted to grip said feeding mechanism, a fixed standard, and resilient means engaging said clamping means and standard for normally holding said percussive motor and drill steel for movement in a given plane, but permitting deviation therefrom on application of force in excess of a predetermined amount to said drill steel in a direction transverse to its axis.

6. In an apparatus of the class described, the combination including a feed cylinder, a hammer and a drill steel supported thereby, clamping means adapted to grip said cylinder, a fixed standard, and resilient means attached thereto and engaging said clamping means for normally holding said hammer and drill steel for movement in a given plane but permitting an angular movement of said cylinder upon a change in plane of movement of the drill steel during the drilling operation.

7. In an apparatus of the class described. the combination including a feed cylinder, a hammer and a drill steel supported thereby, clamping means adapted to grip said cylinder, a fixed standard, and resilient means associated therewith for yieldingly supporting said hammer and drill steel for movement in a given direction but permitting a movement of said cylinder in any direction upon a change of movement of the drill steel during the drilling operation.

8. In combination, a stationary support. feeding means secured to said support, drilling means supported by said feeding means and adapted to be fed thereby with the axis thereof in a predetermined direction as relates to the axis of said feeding means, and means automatically operative to permit change in direction of the axis of said drilling means to efieot automatically a corresponding change in the direction of the axis of said feeding means, said means normally maintaining said feeding means in a predetermined relation to said support.

9. In combination, a stationary support, feeding means normally in predetermined relation to said support, drilling means including a steel adapted to be fed by said feeding means and having the line of its axis arranged in fixed spacial relation to the axis of sa1d feeding means, and means for securing said feeding means to said stationary means in such manner that any angular change in the spacial relation of the axis of said steel relative to its original direction during drilling will automatically occasion a change in the space relation of the feeding means and drill means to said stationary means whereby to maintain the original space relation between feed and drilling means.

10. In combination, a stationary support,

of the axes of the feeding means and of the drilling means may retain their normal relation.

11. In combination, a drill steel, a drilling motor cooperating with said steel to cause the latter to drill a hole, and means for feeding said drilling motor and drill steel comprising a feeding member attached to the former and having its axis parallel to a line which is parallel to the axis of said drilling motor, guiding means for said feeding mem her, a support for said guiding means, and means between said support and guiding means automatically permitting deflection of the axis of the drilling motor and said feeding member, due to a deflection of the hole being drilled, to be followed by a similar deflection of said guiding means.

12. In combination, a drilling mechanism, a feeding means therefor including a cylinder, an adjustable clamping member for said cylinder, a stationary support, and yieldable means cooperating with said clamp to hold said feeding means and drilling mechanism in normal operative position.

In testimony whereof I afix my signature.

ELMER GEORGE GARTIN.

Certificate of Correction.

rs hereby certified that in Letters Patent No. 1,489,755, granted April 8, 1924,

the at) )lieatiO-n of Elmer Geor 'e Gartin of Claremont New Ham )shire for I u a 7 I u a a u :provement 1n Drlll Supports, errors appear 1n the p'rlnted speclficatlon mug correctlon as follows: Page 2, hne 68, clalm '8, strlke out the Word by nsert the same to follow the Word when in line 67, same claim; page 3,

claim 10, for the Word point read line; and that the said Letters Patent 1 be read With these corrections therein that the same may conform to the l of the ease in the Patent Ofiice.

ued and sealed this 15th day of July, A. D. 1924.

[SEAL THOMAS E. ROBERTSON,

Commissioner of Patents. 

